Back in 2012 an Internet user by the name Robert Mott visited a pet shop and stumbled upon a rather unusual sight. One of the snakes in the shop was so stressed out that it tried to eat itself.
Mott made a short video clip of the reptile which shows its suicidal behavior. On the video the snake is biting its tail, thus forming a full circle with its body. The disorientated and stressed reptile probably didn’t know what it was doing at that point, because snakes are known for their brutality when they become disorientated. Since snakes can’t sweat and reduce their body temperature as quickly as other animals can, their mind plays tricks on them by falsely making them believe they are hungry. Because of their high body temperature the snakes get easily dehydrated and disorientated, so they tend to attack the very first thing that comes into their sight.
In this snake’s case, the nearest prey was actually its own tail. It’s not clear if the reptile managed to survive its own brutal attack.
You can see the video on Youtube/user/rob4kym